Posted on 2003-03-12
i have been reading about hash algorithms and i am a little confused. to my understanding, you take a message and then run it through this 'hash calcualtor', this will then spit out a number that cannot be duplicated by any other message. but my question is, does this alter the original message or is this new number just sent along with the message, to prove that it hasn't been altered. so that at the other end, the recipient can run the same message through the 'hash calculator' and then compare the numbers.